karo-tx-linux.git
8 years agopowerpc: Add includes to fix powernv/rng.c build
Stephen Rothwell [Mon, 28 Oct 2013 08:34:41 +0000 (19:34 +1100)]
powerpc: Add includes to fix powernv/rng.c build

Caused by commit a4da0d50b2a0 ("powerpc: Implement
arch_get_random_long/int() for powernv") from the powerpc tree
interacting with commit b5b4bb3f6a11 ("of: only include prom.h on sparc")
from the dt-rh tree.

I added this merge fix patch (which will need to be sent to Linus when
these two trees get merged, or could be applied now to the powerpc tree):

[ Also add linux/smp.h to get cpu_to_chip_id -- BenH ]

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agoMerge remote-tracking branch 'scott/next' into next
Benjamin Herrenschmidt [Tue, 29 Oct 2013 23:26:23 +0000 (10:26 +1100)]
Merge remote-tracking branch 'scott/next' into next

Highlights include corenet board file consolidation, the ability to run
userspaces with lwsync on e500v1/v2, some cleanup patches that other KVM
patches will build on, support for stripped-down e6500 emulation targets,
and some fixes of minor longstanding issues.

8 years agoMerge branch 'for-kvm' into next
Benjamin Herrenschmidt [Tue, 29 Oct 2013 22:47:01 +0000 (09:47 +1100)]
Merge branch 'for-kvm' into next

Add Paul's fix for 32-bit register corruption in the new FP code

8 years agopowerpc: Fix PPC_EMULATED_STATS build break with sync patch
Scott Wood [Tue, 29 Oct 2013 03:07:59 +0000 (22:07 -0500)]
powerpc: Fix PPC_EMULATED_STATS build break with sync patch

Commit 9863c28a2af90a56c088f5f6288d7f6d2c923c14 ("powerpc: Emulate sync
instruction variants") introduced a build breakage with
CONFIG_PPC_EMULATED_STATS enabled.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Kumar Gala <galak@kernel.org>
Cc: James Yang <James.Yang@freescale.com>
---

8 years agopowerpc/6xx: CONFIG_MCU_MPC8349EMITX cannot be a module
Christian Kujau [Mon, 28 Oct 2013 12:51:36 +0000 (05:51 -0700)]
powerpc/6xx: CONFIG_MCU_MPC8349EMITX cannot be a module

During "make ppc6xx_defconfig" the following happens:

  HOSTCC  scripts/basic/fixdep
  GEN     /usr/local/src/tmp/lnx/Makefile
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
arch/powerpc/configs/ppc6xx_defconfig:74:warning: symbol value 'm' invalid for MCU_MPC8349EMITX

Setting CONFIG_MCU_MPC8349EMITX=y in ppc6xx_defconfig makes the warning
go away. This too has been reported by Geert Uytterhoeven a long time ago:
https://lkml.org/lkml/2011/11/13/11  - I only came across this because I
needed a "clean" defconfig for this Powerbook G5.

Signed-off-by: Christian Kujau <lists@nerdbynature.de>
[scottwood@freescale.com: cleaned up commit message slightly]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/mv643xx_eth: fix return check in mv64x60_eth_register_shared_pdev()
Wei Yongjun [Fri, 25 Oct 2013 09:30:24 +0000 (17:30 +0800)]
powerpc/mv643xx_eth: fix return check in mv64x60_eth_register_shared_pdev()

In case of error, the function platform_device_register_simple() returns
RR_PTR() and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/p1010rdb: add P1010RDB-PB platform support
Zhao Qiang [Mon, 14 Oct 2013 06:46:13 +0000 (14:46 +0800)]
powerpc/p1010rdb: add P1010RDB-PB platform support

The P1010RDB-PB is similar to P1010RDB(P1010RDB-PA).
So, P1010RDB-PB use the same platform file as P1010RDB.
Then Add support for P1010RDB-PB platform.

Signed-off-by: Zhao Qiang <B45475@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agoarch/powerpc/platforms/83xx: Remove obsolete cleanup for clientdata
Wolfram Sang [Sun, 13 Oct 2013 16:05:38 +0000 (18:05 +0200)]
arch/powerpc/platforms/83xx: Remove obsolete cleanup for clientdata

A few new i2c-drivers came into the kernel which clear the clientdata-pointer
on exit or error. This is obsolete meanwhile, the core will do it.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/6xx: add missing iounmap() on error in hlwd_pic_init()
Wei Yongjun [Sat, 12 Oct 2013 07:13:19 +0000 (15:13 +0800)]
powerpc/6xx: add missing iounmap() on error in hlwd_pic_init()

Add the missing iounmap() before return from hlwd_pic_init()
in the error handling case.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/8xx: Fixing memory init issue with CONFIG_PIN_TLB
LEROY Christophe [Fri, 11 Oct 2013 12:56:40 +0000 (14:56 +0200)]
powerpc/8xx: Fixing memory init issue with CONFIG_PIN_TLB

Activating CONFIG_PIN_TLB allows access to the 24 first Mbytes of
memory at bootup instead of 8.  It is needed for "big" kernels for
instance when activating CONFIG_LOCKDEP_SUPPORT.  This needs to be
taken into account in init_32 too, otherwise memory allocation soon
fails after startup.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/8xx: Fixing issue with CONFIG_PIN_TLB
LEROY Christophe [Tue, 24 Sep 2013 08:18:39 +0000 (10:18 +0200)]
powerpc/8xx: Fixing issue with CONFIG_PIN_TLB

Activating CONFIG_PIN_TLB is supposed to pin the IMMR and the first
three 8Mbytes pages.  But the setting of MD_CTR to a pinnable entry was
missing before the pinning of the third 8Mb page.  As the index is
decremented module 28 (MD_RSV4D is set) after every DTLB update, the
third 8Mbytes page was not pinned.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/85xx: use one kernel option for all the CoreNet_Generic boards
Kevin Hao [Thu, 26 Sep 2013 01:42:28 +0000 (09:42 +0800)]
powerpc/85xx: use one kernel option for all the CoreNet_Generic boards

Currently all these boards use the same machine struct and also select
the same kernel options, so it seems a bit of redundant to keep one
separate kernel option for each board. Also update the defconfigs
according to this change.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/85xx: rename the corenet_ds.c to corenet_generic.c
Kevin Hao [Thu, 26 Sep 2013 01:42:27 +0000 (09:42 +0800)]
powerpc/85xx: rename the corenet_ds.c to corenet_generic.c

This file is also used by some RDB and QDS boards. So the name seems
not so accurate. Rename it to corenet_generic.c. Also update the
function names in this file according to the change.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
8 years agopowerpc/85xx: introduce corenet_generic machine
Kevin Hao [Thu, 26 Sep 2013 01:42:26 +0000 (09:42 +0800)]
powerpc/85xx: introduce corenet_generic machine

In the current kernel, the board files for p2041rdb, p3041ds, p4080ds,
p5020ds, p5040ds, t4240qds and b4qds are almost the same except the
machine name. So this introduces a cornet_generic machine to support
all these boards to avoid the code duplication.

With these changes the file corenet_ds.h becomes useless. Just delete
it.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/dts/c293pcie: Add range field for IFC NAND
Prabhakar Kushwaha [Tue, 24 Sep 2013 10:50:32 +0000 (16:20 +0530)]
powerpc/dts/c293pcie: Add range field for IFC NAND

C290PCIe has NAND flash present on IFC Chip Select(CS) 1.

So Add "ranges" field for NAND flash on CS1.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/b4860emu: Add device tree file for b4860emu
York Sun [Mon, 16 Sep 2013 23:38:07 +0000 (16:38 -0700)]
powerpc/b4860emu: Add device tree file for b4860emu

B4860EMU is a emualtor target with minimum peripherals. It is based on
B4860QDS and trimmed down most peripherals due to either not modeled or
lack of board level connections. The main purpose of this minimum dts is
to speed up booting on emulator.

Signed-off-by: York Sun <yorksun@freescale.com>
[scottwood@freescale.com: whitespace fix]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/t4240emu: Add device tree file for t4240emu
York Sun [Mon, 16 Sep 2013 23:38:06 +0000 (16:38 -0700)]
powerpc/t4240emu: Add device tree file for t4240emu

T4240EMU is an emulator target with minimum peripherals. It is based on
T4240QDS and trimmed down most peripherals due to either not modeled or
lack of board level connections. The main purpose of this minimum dts is
to speed up booting on emulator.

Signed-off-by: York Sun <yorksun@freescale.com>
[scottwood@freescale.com: whitespace fixes]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/b4qds: enable coreint
Scott Wood [Wed, 11 Sep 2013 23:36:52 +0000 (18:36 -0500)]
powerpc/b4qds: enable coreint

Commit 9837b43c5f3514e5d28f65f1513f4dc6759d2810 ("powerpc/85xx: enable
coreint for all the 64bit boards") removed the ifdef that avoided
coreint on 64-bit, but it missed b4_qds.c.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Kevin Hao <haokexin@gmail.com>
Cc: Shaveta Leekha <shaveta@freescale.com>
8 years agopowerpc/8xx: Revert commit e0908085fc2391c85b85fb814ae1df377c8e0dcb
LEROY Christophe [Wed, 11 Sep 2013 16:44:44 +0000 (18:44 +0200)]
powerpc/8xx: Revert commit e0908085fc2391c85b85fb814ae1df377c8e0dcb

The commit e0908085fc2391c85b85fb814ae1df377c8e0dcb ("powerpc/8xx: Fix
regression introduced by cache coherency rewrite") is not needed
anymore.  The issue was because dcbst wrongly sets the store bit when
causing a DTLB error, but this is now fixed by commit
0a2ab51ffb8dfdf51402dcfb446629648c96bc78 ("powerpc/8xx: Fixup DAR from
buggy dcbX instructions.") which handles the buggy dcbx instructions on
data page faults on the 8xx.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[scottwood@freescale.com: fix commit message]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: Add I2C bus multiplexer node for B4 and T4240QDS
Hongtao Jia [Mon, 9 Sep 2013 10:03:33 +0000 (18:03 +0800)]
powerpc: Add I2C bus multiplexer node for B4 and T4240QDS

In both B4 and T4240QDS platform PCA9547 I2C bus multiplexer is used.
The sub-nodes are also reorganized according to right I2C topology.

Signed-off-by: Jia Hongtao <hongtao.jia@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/fsl/defconfig: enable CONFIG_AT803X_PHY
Shengzhou Liu [Tue, 3 Sep 2013 08:28:26 +0000 (16:28 +0800)]
powerpc/fsl/defconfig: enable CONFIG_AT803X_PHY

Enable CONFIG_AT803X_PHY to support AR8030/8033/8035 PHY.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/dts: Correct sdhci quirk for bsc9131
Haijun.Zhang [Mon, 2 Sep 2013 10:37:02 +0000 (18:37 +0800)]
powerpc/dts: Correct sdhci quirk for bsc9131

We use property "sdhci,auto-cmd12" instead of "fsl,sdhci-auto-cmd12"
to distinguish if the sdhc host has quirk SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12.

Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/eSDCH: Specify voltage for T4240QDS
Haijun.Zhang [Thu, 29 Aug 2013 03:31:28 +0000 (11:31 +0800)]
powerpc/eSDCH: Specify voltage for T4240QDS

Freescale T4240QDS reference board has extra voltage shifters added
to allow 3.3V operation, so add 3.3v voltage support for T4240QDS.
1.8v and 3.3v is recommand for eMMC and SDHC card.

Signed-off-by: Haijun Zhang <haijun.zhang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/mpc8xx: Clearer Oops message for Software Emulation Exception
LEROY Christophe [Wed, 28 Aug 2013 14:19:17 +0000 (16:19 +0200)]
powerpc/mpc8xx: Clearer Oops message for Software Emulation Exception

This patch modifies the Oops message in case of Software Emulation Exception.
The existing message is quite confusing because it refers to FPU Emulation
while most often the issue is due to either a non supported instruction
(not necessarily FPU related) or a stale instruction due to HW issues.
The new message tries to be more generic in order to make the user understand
that the Oops is due to something wrong with an instruction, not necessarily
due to an FPU instruction.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: Set the NOTE type for SPE regset
Suzuki Poulose [Tue, 27 Aug 2013 07:52:14 +0000 (13:22 +0530)]
powerpc: Set the NOTE type for SPE regset

The regset defintion for SPE doesn't have the core_note_type
set, which prevents it from being dumped. Add the note type
NT_PPC_SPE for SPE regset.

Signed-off-by: Suzuki K Poulose <suzuki@in.ibm.com>
Cc: Roland McGrath <roland@hack.frob.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/e500v2: Include Power ISA properties
Lijun Pan [Thu, 24 Oct 2013 21:03:25 +0000 (16:03 -0500)]
powerpc/e500v2: Include Power ISA properties

bsc9131 device tree does not have these properties.

Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/e6500: Include Power ISA properties
Lijun Pan [Thu, 24 Oct 2013 21:11:13 +0000 (16:11 -0500)]
powerpc/e6500: Include Power ISA properties

b4420 and b4860 device trees do not have these properties.

Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/pci: Change the DECLARE_PCI_FIXUP_{HEADER => EARLY} macro of pci quirk
Chunhe Lan [Fri, 2 Aug 2013 08:46:25 +0000 (16:46 +0800)]
powerpc/pci: Change the DECLARE_PCI_FIXUP_{HEADER => EARLY} macro of pci quirk

Freescale platform has class code = 0x0b2000, when it boots. This makes
kernel PCI bus code to setup these devices resulting into the following
notice information when trying to enable them:

pci 0000:00:00.0: ignoring class 0x0b2000 (doesn't match header type 01)

The above information is outputted by judging value of dev->class before
pci_setup_device() function, and the DECLARE_PCI_FIXUP_HEADER quirk runs
after pci_setup_device() function. But the DECLARE_PCI_FIXUP_EARLY quirk
runs before judging value of dev->class and pci_setup_device() function.
So we use the DECLARE_PCI_FIXUP_EARLY macro to fix this issue.

Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/dts: fix sRIO error interrupt for b4860
Minghuan Lian [Wed, 31 Jul 2013 02:59:07 +0000 (10:59 +0800)]
powerpc/dts: fix sRIO error interrupt for b4860

For B4 platform, MPIC EISR register is in reversed bitmap order,
instead of "Error interrupt source 0-31. Bit 0 represents SRC0."
the correct ordering is "Error interrupt source 0-31. Bit 0
represents SRC31." This patch is to fix sRIO EISR bit value
of error interrupt in dts node.

Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: Don't corrupt user registers on 32-bit
Paul Mackerras [Wed, 23 Oct 2013 08:40:02 +0000 (09:40 +0100)]
powerpc: Don't corrupt user registers on 32-bit

Commit de79f7b9f6 ("powerpc: Put FP/VSX and VR state into structures")
modified load_up_fpu() and load_up_altivec() in such a way that they
now use r7 and r8.  Unfortunately, the callers of these functions on
32-bit machines then return to userspace via fast_exception_return,
which doesn't restore all of the volatile GPRs, but only r1, r3 -- r6
and r9 -- r12.  This was causing userspace segfaults and other
userspace misbehaviour on 32-bit machines.

This fixes the problem by changing the register usage of load_up_fpu()
and load_up_altivec() to avoid using r7 and r8 and instead use r6 and
r10.  This also adds comments to those functions saying which registers
may be used.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Scott Wood <scottwood@freescale.com> (on e500mc, so no altivec)
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/booke: clear DBCR0_BT in user_disable_single_step()
James Yang [Fri, 5 Jul 2013 19:49:43 +0000 (14:49 -0500)]
powerpc/booke: clear DBCR0_BT in user_disable_single_step()

BookE version of user_disable_single_step() clears DBCR0_IC for the
instruction completion debug, but did not also clear DBCR0_BT for the
branch taken exception.  This behavior was lost by the 2/2010 patch.

Signed-off-by: James Yang <James.Yang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: export debug registers save function for KVM
Bharat Bhushan [Thu, 4 Jul 2013 06:57:44 +0000 (12:27 +0530)]
powerpc: export debug registers save function for KVM

KVM need this function when switching from vcpu to user-space
thread. My subsequent patch will use this function.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: move debug registers in a structure
Bharat Bhushan [Thu, 4 Jul 2013 06:15:46 +0000 (11:45 +0530)]
powerpc: move debug registers in a structure

This way we can use same data type struct with KVM and
also help in using other debug related function.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: Michael Neuling <mikey@neuling.org>
[scottwood@freescale.com: removed obvious debug_reg comment]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: remove unnecessary line continuations
Bharat Bhushan [Thu, 4 Jul 2013 06:15:45 +0000 (11:45 +0530)]
powerpc: remove unnecessary line continuations

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info
Tiejun Chen [Thu, 20 Jun 2013 10:28:29 +0000 (18:28 +0800)]
powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info

Use DEFINE_PER_CPU to allocate thread_info statically instead of kmalloc().
This can avoid introducing more memory check codes.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
[scottwood@freescale.com: wrapped long line]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: Emulate sync instruction variants
James Yang [Wed, 3 Jul 2013 21:26:47 +0000 (16:26 -0500)]
powerpc: Emulate sync instruction variants

Reserved fields of the sync instruction have been used for other
instructions (e.g. lwsync).  On processors that do not support variants
of the sync instruction, emulate it by executing a sync to subsume the
effect of the intended instruction.

Signed-off-by: James Yang <James.Yang@freescale.com>
[scottwood@freescale.com: whitespace and subject line fix]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/fsl-booke: Use common defines for SPE/FP interrupts numbers
Mihai Caraman [Mon, 1 Jul 2013 15:35:31 +0000 (18:35 +0300)]
powerpc/fsl-booke: Use common defines for SPE/FP interrupts numbers

On Book3E some SPE/FP/AltiVec interrupts share the same number. Use
common defines to indentify these numbers.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
[scottwood@freescale.com: fixed space-before-tab]
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc/booke64: Use common defines for AltiVec interrupts numbers
Mihai Caraman [Mon, 1 Jul 2013 15:35:30 +0000 (18:35 +0300)]
powerpc/booke64: Use common defines for AltiVec interrupts numbers

On Book3E some SPE/FP/AltiVec interrupts share the same number. Use
common defines to indentify these numbers.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agopowerpc: remove dependency on MV64360
Paul Bolle [Wed, 15 May 2013 09:21:01 +0000 (11:21 +0200)]
powerpc: remove dependency on MV64360

The Kconfig entry that allows to "Distribute interrupts on all CPUs by
default" has a (negative) dependency on MV64360. But that Kconfig symbol
was removed in v2.6.27, which means that this dependency has evaluated
to true ever since. It can be removed too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Scott Wood <scottwood@freescale.com>
8 years agoMerge branch 'for-kvm' into next
Benjamin Herrenschmidt [Fri, 11 Oct 2013 07:23:53 +0000 (18:23 +1100)]
Merge branch 'for-kvm' into next

Topic branch for commits that the KVM tree might want to pull
in separately.

Hand merged a few files due to conflicts with the LE stuff

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Provide for giveup_fpu/altivec to save state in alternate location
Paul Mackerras [Tue, 10 Sep 2013 10:21:10 +0000 (20:21 +1000)]
powerpc: Provide for giveup_fpu/altivec to save state in alternate location

This provides a facility which is intended for use by KVM, where the
contents of the FP/VSX and VMX (Altivec) registers can be saved away
to somewhere other than the thread_struct when kernel code wants to
use floating point or VMX instructions.  This is done by providing a
pointer in the thread_struct to indicate where the state should be
saved to.  The giveup_fpu() and giveup_altivec() functions test these
pointers and save state to the indicated location if they are non-NULL.
Note that the MSR_FP/VEC bits in task->thread.regs->msr are still used
to indicate whether the CPU register state is live, even when an
alternate save location is being used.

This also provides load_fp_state() and load_vr_state() functions, which
load up FP/VSX and VMX state from memory into the CPU registers, and
corresponding store_fp_state() and store_vr_state() functions, which
store FP/VSX and VMX state into memory from the CPU registers.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Put FP/VSX and VR state into structures
Paul Mackerras [Tue, 10 Sep 2013 10:20:42 +0000 (20:20 +1000)]
powerpc: Put FP/VSX and VR state into structures

This creates new 'thread_fp_state' and 'thread_vr_state' structures
to store FP/VSX state (including FPSCR) and Altivec/VSX state
(including VSCR), and uses them in the thread_struct.  In the
thread_fp_state, the FPRs and VSRs are represented as u64 rather
than double, since we rarely perform floating-point computations
on the values, and this will enable the structures to be used
in KVM code as well.  Similarly FPSCR is now a u64 rather than
a structure of two 32-bit values.

This takes the offsets out of the macros such as SAVE_32FPRS,
REST_32FPRS, etc.  This enables the same macros to be used for normal
and transactional state, enabling us to delete the transactional
versions of the macros.   This also removes the unused do_load_up_fpu
and do_load_up_altivec, which were in fact buggy since they didn't
create large enough stack frames to account for the fact that
load_up_fpu and load_up_altivec are not designed to be called from C
and assume that their caller's stack frame is an interrupt frame.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: add real mode support for dma operations on powernv
Alexey Kardashevskiy [Wed, 28 Aug 2013 08:37:43 +0000 (18:37 +1000)]
powerpc: add real mode support for dma operations on powernv

The existing TCE machine calls (tce_build and tce_free) only support
virtual mode as they call __raw_writeq for TCE invalidation what
fails in real mode.

This introduces tce_build_rm and tce_free_rm real mode versions
which do mostly the same but use "Store Doubleword Caching Inhibited
Indexed" instruction for TCE invalidation.

This new feature is going to be utilized by real mode support of VFIO.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Prepare to support kernel handling of IOMMU map/unmap
Alexey Kardashevskiy [Wed, 28 Aug 2013 08:37:42 +0000 (18:37 +1000)]
powerpc: Prepare to support kernel handling of IOMMU map/unmap

The current VFIO-on-POWER implementation supports only user mode
driven mapping, i.e. QEMU is sending requests to map/unmap pages.
However this approach is really slow, so we want to move that to KVM.
Since H_PUT_TCE can be extremely performance sensitive (especially with
network adapters where each packet needs to be mapped/unmapped) we chose
to implement that as a "fast" hypercall directly in "real
mode" (processor still in the guest context but MMU off).

To be able to do that, we need to provide some facilities to
access the struct page count within that real mode environment as things
like the sparsemem vmemmap mappings aren't accessible.

This adds an API function realmode_pfn_to_page() to get page struct when
MMU is off.

This adds to MM a new function put_page_unless_one() which drops a page
if counter is bigger than 1. It is going to be used when MMU is off
(for example, real mode on PPC64) and we want to make sure that page
release will not happen in real mode as it may crash the kernel in
a horrible way.

CONFIG_SPARSEMEM_VMEMMAP and CONFIG_FLATMEM are supported.

Cc: linux-mm@kvack.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agohashtable: add hash_for_each_possible_rcu_notrace()
Alexey Kardashevskiy [Wed, 28 Aug 2013 08:37:39 +0000 (18:37 +1000)]
hashtable: add hash_for_each_possible_rcu_notrace()

This adds hash_for_each_possible_rcu_notrace() which is basically
a notrace clone of hash_for_each_possible_rcu() which cannot be
used in real mode due to its tracing/debugging capability.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/eeh: Reorder output messages
Gavin Shan [Fri, 6 Sep 2013 01:00:05 +0000 (09:00 +0800)]
powerpc/eeh: Reorder output messages

We already had some output messages from EEH core. Occasionally,
we can see the output messages from EEH core before the stack
dump. That's not what we expected. The patch fixes that and shows
the stack dump prior to output messages from EEH core.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/eeh: Output PHB3 diag-data
Gavin Shan [Fri, 6 Sep 2013 01:00:04 +0000 (09:00 +0800)]
powerpc/eeh: Output PHB3 diag-data

The patch adds function ioda_eeh_phb3_phb_diag() to dump PHB3
PHB diag-data. That's called while detecting informative errors
or frozen PE on the specific PHB.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Double size of log blob
Gavin Shan [Fri, 6 Sep 2013 01:00:03 +0000 (09:00 +0800)]
powerpc/powernv: Double size of log blob

Each PHB instance (struct pnv_phb) has its corresponding log blob,
which is used to hold the retrieved error log from firmware. The
current size of that (4096) isn't enough for PHB3 case and the patch
makes that double to 8192.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/eeh: Output error number
Gavin Shan [Fri, 6 Sep 2013 01:00:02 +0000 (09:00 +0800)]
powerpc/eeh: Output error number

The patch prints the error number while failing to retrieve error
log from firmware. It's helpful for debugging.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Support inbound error injection
Gavin Shan [Fri, 6 Sep 2013 01:00:01 +0000 (09:00 +0800)]
powerpc/powernv: Support inbound error injection

For now, we only support outbound error injection. Actually, the
hardware supports injecting inbound errors as well. The patch enables
to inject inbound errors.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Enable EEH for PHB3
Gavin Shan [Fri, 6 Sep 2013 01:00:00 +0000 (09:00 +0800)]
powerpc/powernv: Enable EEH for PHB3

The EEH isn't enabled for PHB3 and the patch intends to enable it.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/scom: Use "devspec" rather than "path" in debugfs entries
Benjamin Herrenschmidt [Thu, 29 Aug 2013 07:25:35 +0000 (17:25 +1000)]
powerpc/scom: Use "devspec" rather than "path" in debugfs entries

This is the traditional name for device-tree path, used in sysfs,
do the same for the XSCOM debugfs files.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/scom: CONFIG_SCOM_DEBUGFS should depend on CONFIG_DEBUG_FS
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:58:12 +0000 (16:58 +1000)]
powerpc/scom: CONFIG_SCOM_DEBUGFS should depend on CONFIG_DEBUG_FS

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Add scom support under OPALv3
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:57:33 +0000 (16:57 +1000)]
powerpc/powernv: Add scom support under OPALv3

OPAL v3 provides interfaces to access the chips XSCOM, expose
this via the existing scom infrastructure.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/scom: Create debugfs files using ibm,chip-id if available
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:56:59 +0000 (16:56 +1000)]
powerpc/scom: Create debugfs files using ibm,chip-id if available

When creating the debugfs scom files, use "ibm,chip-id" as the scom%d
index rather than a simple made up number when possible.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/scom: Add support for "reg" property
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:56:16 +0000 (16:56 +1000)]
powerpc/scom: Add support for "reg" property

When devices are direct children of a scom controller node, they
should be able to use the normal "reg" property instead of "scom-reg".

In that case, they also use #address-cells rather than #scom-cells
to indicate the size of an entry.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/scom: Change scom_read() and scom_write() to return errors
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:55:45 +0000 (16:55 +1000)]
powerpc/scom: Change scom_read() and scom_write() to return errors

scom_read() now returns the read value via a pointer argument and
both functions return an int error code

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Enable /dev/port when isa_io_special is set
Benjamin Herrenschmidt [Thu, 29 Aug 2013 06:55:07 +0000 (16:55 +1000)]
powerpc: Enable /dev/port when isa_io_special is set

isa_io_special is set when the platform provides a "special"
implementation of inX/outX via some FW interface for example.

Such a platform doesn't need an ISA bridge on PCI, and so /dev/port
should be made available even if one isn't present.

This makes the LPC bus IOs accessible via /dev/port on PowerNV Power8

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Make ftrace endian-safe.
Eugene Surovegin [Fri, 20 Sep 2013 18:42:21 +0000 (11:42 -0700)]
powerpc: Make ftrace endian-safe.

Signed-off-by: Eugene Surovegin <surovegin@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Make kernel module helper endian-safe.
Eugene Surovegin [Fri, 20 Sep 2013 18:42:20 +0000 (11:42 -0700)]
powerpc: Make kernel module helper endian-safe.

Signed-off-by: Eugene Surovegin <surovegin@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: prom_init exception when updating core value
Laurent Dufour [Tue, 17 Sep 2013 09:52:48 +0000 (11:52 +0200)]
powerpc: prom_init exception when updating core value

Since the CPU is generating an exception when accessing unaligned word, and
as this exception is not yet handled when running prom_init, data should be
copied from the architecture vector byte per byte.

Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/booke64: Check napping in performance monitor interrupt
Kevin Hao [Thu, 26 Sep 2013 08:23:56 +0000 (16:23 +0800)]
powerpc/booke64: Check napping in performance monitor interrupt

The performance monitor interrupt is asynchronous, so we should check
if the current processor is in napping status in the handler of this
interrupt.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/kernel: Fix endian issue in rtas_pci
Cedric Le Goater [Mon, 23 Sep 2013 12:17:54 +0000 (14:17 +0200)]
powerpc/kernel: Fix endian issue in rtas_pci

Signed-off-by: C├ędric Le Goater <clg@fr.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/pseries: Implement arch_get_random_long() based on H_RANDOM
Michael Ellerman [Fri, 11 Oct 2013 03:07:59 +0000 (14:07 +1100)]
powerpc/pseries: Implement arch_get_random_long() based on H_RANDOM

Add support for the arch_get_random_long() hook based on the H_RANDOM
hypervisor call. We trust the hypervisor to provide us with random data,
ie. we don't whiten it in anyway.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agohwrng: Add a driver for the hwrng found in power7+ systems
Michael Ellerman [Fri, 11 Oct 2013 03:07:58 +0000 (14:07 +1100)]
hwrng: Add a driver for the hwrng found in power7+ systems

Add a driver for the hwrng found in power7+ systems, based on the
existing code for the arch_get_random_long() hook.

We only register a single instance of the driver, not one per device,
because we use the existing per_cpu array of devices in the arch code.
This means we always read from the "closest" device, avoiding inter-chip
memory traffic.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Implement arch_get_random_long/int() for powernv
Michael Ellerman [Fri, 11 Oct 2013 03:07:57 +0000 (14:07 +1100)]
powerpc: Implement arch_get_random_long/int() for powernv

Add the plumbing to implement arch_get_random_long/int(). It didn't seem
worth adding an extra ppc_md hook for int, so we reuse the one for long.

Add an implementation for powernv based on the hwrng found in power7+
systems. We whiten the output of the hwrng, and the result passes all
the dieharder tests.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agohwrng: Return errors to upper levels in pseries-rng.c
Michael Ellerman [Wed, 25 Sep 2013 09:24:17 +0000 (19:24 +1000)]
hwrng: Return errors to upper levels in pseries-rng.c

We don't expect to get errors from the hypervisor when reading the rng,
but if we do we should pass the error up to the hwrng driver. Otherwise
the hwrng driver will continue calling us forever.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Added __cmpdi2 for signed 64bit comparision
Bharat Bhushan [Wed, 9 Oct 2013 05:11:17 +0000 (10:41 +0530)]
powerpc: Added __cmpdi2 for signed 64bit comparision

This was missing on powerpc and I am getting compilation error
drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'
drivers/vfio/pci/vfio_pci_rdwr.c:193: undefined reference to `__cmpdi2'

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Fix section mismatch warning in free_lppacas
Vladimir Murzin [Sun, 29 Sep 2013 12:41:18 +0000 (14:41 +0200)]
powerpc: Fix section mismatch warning in free_lppacas

While cross-building for PPC64 I've got bunch of

WARNING: arch/powerpc/kernel/built-in.o(.text.unlikely+0x2d2): Section
mismatch in reference from the function .free_lppacas() to the variable
.init.data:lppaca_size The function .free_lppacas() references the variable
__initdata lppaca_size. This is often because .free_lppacas lacks a __initdata
annotation or the annotation of lppaca_size is wrong.

Fix it by using proper annotation for free_lppacas. Additionally, annotate
{allocate,new}_llpcas properly.

Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/ppc64: Remove the unneeded load of ti_flags in resume_kernel
Kevin Hao [Thu, 26 Sep 2013 08:41:34 +0000 (16:41 +0800)]
powerpc/ppc64: Remove the unneeded load of ti_flags in resume_kernel

We already got the value of current_thread_info and ti_flags and store
them into r9 and r4 respectively before jumping to resume_kernel. So
there is no reason to reload them again.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/8xx/tqm8xx: Fix incorrect placement of __initdata tag
Bartlomiej Zolnierkiewicz [Mon, 30 Sep 2013 13:13:55 +0000 (15:13 +0200)]
powerpc/8xx/tqm8xx: Fix incorrect placement of __initdata tag

__initdata tag should be placed between the variable name and equal
sign for the variable to be placed in the intended .init.data section.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/legacy_serial: Fix incorrect placement of __initdata tag
Bartlomiej Zolnierkiewicz [Mon, 30 Sep 2013 13:11:42 +0000 (15:11 +0200)]
powerpc/legacy_serial: Fix incorrect placement of __initdata tag

__initdata tag should be placed between the variable name and equal
sign for the variable to be placed in the intended .init.data section.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/mpic: Disable preemption when calling mpic_processor_id()
Scott Wood [Fri, 27 Sep 2013 00:18:18 +0000 (19:18 -0500)]
powerpc/mpic: Disable preemption when calling mpic_processor_id()

Otherwise, we get a debug traceback due to the use of
smp_processor_id() (or get_paca()) inside hard_smp_processor_id().
mpic_host_map() is just looking for a default CPU, so it doesn't matter
if we migrate after getting the CPU ID.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Work around little endian gcc bug
Anton Blanchard [Mon, 23 Sep 2013 02:05:13 +0000 (12:05 +1000)]
powerpc: Work around little endian gcc bug

Temporarily work around an ICE we are seeing while building
in little endian mode:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57134

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Don't set HAVE_EFFICIENT_UNALIGNED_ACCESS on little endian builds
Anton Blanchard [Mon, 23 Sep 2013 02:05:12 +0000 (12:05 +1000)]
powerpc: Don't set HAVE_EFFICIENT_UNALIGNED_ACCESS on little endian builds

POWER7 takes alignment exceptions on some unaligned addresses, so
disable HAVE_EFFICIENT_UNALIGNED_ACCESS. This fixes an early boot
issue in the printk code.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Add ability to build little endian kernels
Ian Munsie [Mon, 23 Sep 2013 02:05:11 +0000 (12:05 +1000)]
powerpc: Add ability to build little endian kernels

This patch allows the kbuild system to successfully compile a kernel
for the little endian PowerPC64 architecture. A subsequent patch
will add the CONFIG_CPU_LITTLE_ENDIAN kernel config option which
must be set to build such a kernel.

If cross compiling, CROSS_COMPILE must point to a suitable toolchain
(compiled for the powerpc64le-linux and powerpcle-linux targets).

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agoKVM: PPC: Disable KVM on little endian builds
Anton Blanchard [Mon, 23 Sep 2013 02:05:09 +0000 (12:05 +1000)]
KVM: PPC: Disable KVM on little endian builds

There are a number of KVM issues with little endian builds.
We are working on fixing them, but in the meantime disable
it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agotty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safe
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:08 +0000 (12:05 +1000)]
tty/hvc_opal: powerpc: Make OPAL HVC device tree accesses endian safe

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/hvsi: Fix endian issues in HVSI driver
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:07 +0000 (12:05 +1000)]
powerpc/hvsi: Fix endian issues in HVSI driver

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix some PCI sparse errors and one LE bug
Anton Blanchard [Mon, 23 Sep 2013 02:05:06 +0000 (12:05 +1000)]
powerpc/powernv: Fix some PCI sparse errors and one LE bug

pnv_pci_setup_bml_iommu was missing a byteswap of a device
tree property.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: More little endian issues in OPAL RTC driver
Anton Blanchard [Mon, 23 Sep 2013 02:05:05 +0000 (12:05 +1000)]
powerpc/powernv: More little endian issues in OPAL RTC driver

Sparse caught an issue where opal_set_rtc_time was incorrectly
byteswapping. Also fix a number of sparse warnings.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Don't register exception handlers in little endian mode
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:04 +0000 (12:05 +1000)]
powerpc/powernv: Don't register exception handlers in little endian mode

The powernv exception handlers are not ready to take exceptions
in little endian mode, so disable them.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix OPAL entry and exit in little endian mode
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:03 +0000 (12:05 +1000)]
powerpc/powernv: Fix OPAL entry and exit in little endian mode

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix endian issues in OPAL console and udbg backend
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:02 +0000 (12:05 +1000)]
powerpc/powernv: Fix endian issues in OPAL console and udbg backend

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix endian issues in powernv PCI code
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:01 +0000 (12:05 +1000)]
powerpc/powernv: Fix endian issues in powernv PCI code

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Make OPAL NVRAM device tree accesses endian safe
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:05:00 +0000 (12:05 +1000)]
powerpc/powernv: Make OPAL NVRAM device tree accesses endian safe

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix endian issues in OPAL ICS backend
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:04:59 +0000 (12:04 +1000)]
powerpc/powernv: Fix endian issues in OPAL ICS backend

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv: Fix endian issues in OPAL RTC driver
Benjamin Herrenschmidt [Mon, 23 Sep 2013 02:04:58 +0000 (12:04 +1000)]
powerpc/powernv: Fix endian issues in OPAL RTC driver

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Little endian sparse clean up for arch/powerpc/platforms/powernv/pci-ioda.c
Alistair Popple [Mon, 23 Sep 2013 02:04:57 +0000 (12:04 +1000)]
powerpc: Little endian sparse clean up for arch/powerpc/platforms/powernv/pci-ioda.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Little endian fix for arch/powerpc/platforms/powernv/pci-p5ioc2.c
Alistair Popple [Mon, 23 Sep 2013 02:04:56 +0000 (12:04 +1000)]
powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci-p5ioc2.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Little endian fix for arch/powerpc/platforms/powernv/pci.c
Alistair Popple [Mon, 23 Sep 2013 02:04:55 +0000 (12:04 +1000)]
powerpc: Little endian fix for arch/powerpc/platforms/powernv/pci.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Little endian fixes for platforms/powernv/opal.c
Alistair Popple [Mon, 23 Sep 2013 02:04:54 +0000 (12:04 +1000)]
powerpc: Little endian fixes for platforms/powernv/opal.c

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: uname should return ppc64le/ppcle on little endian builds
Anton Blanchard [Mon, 23 Sep 2013 02:04:53 +0000 (12:04 +1000)]
powerpc: uname should return ppc64le/ppcle on little endian builds

We need to distinguish between big endian and little endian
environments, so fix uname to return the right thing.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Use generic memcpy code in little endian
Anton Blanchard [Mon, 23 Sep 2013 02:04:52 +0000 (12:04 +1000)]
powerpc: Use generic memcpy code in little endian

We need to fix some endian issues in our memcpy code. For now
just enable the generic memcpy routine for little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Use generic checksum code in little endian
Anton Blanchard [Mon, 23 Sep 2013 02:04:51 +0000 (12:04 +1000)]
powerpc: Use generic checksum code in little endian

We need to fix some endian issues in our checksum code. For now
just enable the generic checksum routines for little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Handle VSX alignment faults in little endian mode
Anton Blanchard [Mon, 23 Sep 2013 02:04:50 +0000 (12:04 +1000)]
powerpc: Handle VSX alignment faults in little endian mode

Things are complicated by the fact that VSX elements are big
endian ordered even in little endian mode. 8 byte loads and
stores also write to the top 8 bytes of the register.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Add little endian support to alignment handler
Anton Blanchard [Mon, 23 Sep 2013 02:04:49 +0000 (12:04 +1000)]
powerpc: Add little endian support to alignment handler

Handle most unaligned load and store faults in little
endian mode. Strings, multiples and VSX are not supported.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Alignment handler shouldn't access VSX registers with TS_FPR
Anton Blanchard [Mon, 23 Sep 2013 02:04:48 +0000 (12:04 +1000)]
powerpc: Alignment handler shouldn't access VSX registers with TS_FPR

The TS_FPR macro selects the FPR component of a VSX register (the
high doubleword). emulate_vsx is using this macro to get the
address of the associated VSX register. This happens to work on big
endian, but fails on little endian.

Replace it with an explicit array access.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Remove hard coded FP offsets in alignment handler
Anton Blanchard [Mon, 23 Sep 2013 02:04:47 +0000 (12:04 +1000)]
powerpc: Remove hard coded FP offsets in alignment handler

The alignment handler assumes big endian ordering when selecting
the low word of a 64bit floating point value. Use the existing
union which works in both little and big endian.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc: Remove open coded byte swap macro in alignment handler
Anton Blanchard [Mon, 23 Sep 2013 02:04:46 +0000 (12:04 +1000)]
powerpc: Remove open coded byte swap macro in alignment handler

Use swab64/32/16 instead of open coding it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>